Arrange the following concepts related to global stratification in the correct sequence from the most basic to the most complex: A) Analysis of economic indicators like GDP and GNI, B) Recognition of global inequalities, C) Oversimplification of countries into 'First World' and 'Third World', D) Understanding the hierarchical classification of nations.

To understand global stratification, we start with the recognition of global inequalities, which is the basic awareness that some countries are wealthier and more powerful than others. Next, we analyze economic indicators like GDP and GNI to measure these inequalities more precisely, providing data that shows how different nations compare economically. Following this, we often encounter the oversimplification of countries into categories like 'First World' and 'Third World,' which can misrepresent the complexities of their situations. Finally, we develop a deeper understanding of the hierarchical classification of nations, which considers various factors beyond just economic indicators, such as social and political elements. For example, while two countries might have similar GDPs, their social structures and political stability can differ greatly, affecting their overall status in the global hierarchy.